Jack.



H. S. .IILLSON AND W. H. SWEENEY.

JACK.

APPLICATION FILED APR. I7. 1919.

1,326,45 1 Patented Dec. 30,1919.

2 SHEETS-SHEET 2- UNITED STATES PATENT OFFICE.

HARLAN S. iIILLSON, 0F TURNERS FALLS, AN I) WILLIAIVI I-I. SWEENEY, OF GREENFIELD,

MASSACHUSETTS; SAID J ILLSON ASSIGN OR OF HIS RIGHT TO WILLIAM H. SWEENEY, I

0F GREENFIELD, MASSACHUSETTS.

JACK;

Specification of Letters Patent. Patented Dec. 30, 1919.

Applicationfiled April 17, 1919. Serial No. 290,788.

To all whom it may concern:

Be it-known that we, HARLAN S. JILLSON and \VILLIAM H. SWEENEY, citizens of the United States, residing at Turners Falls and Greenfield, respectively, in the count of Franklin and State of Massachusetts, iave invented certain new and useful Improvements in Jacks, of which the following is a specification. v

The present invention relates to improvements in jacks, adapted for use in connection with automobiles or the like, while not necessarily restricted to this use.

An important object of the invention is to provide a jack of the above mentioned character, which may be placed beneath an automobile or the like, and operated by a relatively 1on handle extending outwardly of the automobile. I

-A further object of the invention is to provide a jack of the above mentioned character which is strong, durable, and quick in action.

Other objects and advantages of the invention will be apparent during the course of the following description.

1n the accompanying drawings forming a part of this specification, and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a side elevation of a jack embodying the invention,

Fig. 2 is a horizontal sectional view, taken on line 22 of Fig. 1,

Fig. 3 is a side elevation of the jack showing its lift head elevated,

Fig. 4 is a detail section 44 of Fig. 1, .v

Fig. 5 is a similar view taken on line 5-5 of Fig 1,

Fig. 6 is a detail section taken on line 6-6 of Fig. 1,

Fig. 7 is a similar view taken on line 77 of Fig. 1,

Fig. 8 is a longitudinal section taken on line 8-8 of Fig. 1, and,

Fig. 9 is a perspective view of the operating handle.

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of the invention, the numeral 10 desig nates a tubular standard formed upon a base 11, as shown. tubular standard is a vertically adjustable taken on line is thus seen nally of the shaft 20, I i 22, the nut may be freely rotated, as is ob- Slidably engaging within the bar 12, having a transverse opening formed therein to receive a lock pin 13, projectin radially upon the opposite sides thereof.

I This lock pin is adapted to be operated in diametrically oppositely arranged vertical slots 14, having shoulders or notches 15. It that the lift bar 12 may be elevated with respect to the standard 10, and by slightly turning the same the ends of the lock pin 13 may enter the notches 15, whereby the lift bar is retained elevated. This construction. is provided for quick adjustment.

.Rigidly connected with the upper end of the lift bar 12 and preferably formed integral therewith is a cylindrical horizontal sleeve 16, slidably receiving a lower horizontal shaft or rod 17. At its outer end, this rod 17, as more clearly shown in Fig. 5, '1 provided with a head or casting 18.

The numeral 20 designates an upper horiprovided to lock the nut" with a coacting set of teeth carried by the sleeve 21.

When the sleeve 21 is moved longitudiaway from the nut vious.

The sleeve 21 is provided with an upwardly projectinglift head or element 23, carrying a vise aw 24, as shown. A coacting upper sleeve 25 is rotatable upon a smooth portion 26 of the up er shaft 20. The sleeve 25 is equipped wit an annular flange 27 preferably formed integral therewith, and this flangeis arranged near an annular flange 28, preferably formed integral with the shaft 20. Balls 29 are arranged between the flanges 27 and 28 and coact therewith to form a thrust bearing, as

other are pivotally connected at points,

equally distantly spaced from the ends thereof, as shown at 33.. The lower ends of the inner links 31 are apertured, as shown I at 34, for pivotally receivingtrunnions 35\ formed upon the sleeve 16,w le their upper ends are apertured, as shown at 36, for pivotally receiving trunnions 37, formed upon the sleeve 25. Thelower ends of the outer links 32 are apertured,as shown at 38, for receiving trunnions 39, formed upon the head' 18, as clearly shown in, Fig. 5. The upper ends of the links 32 are apertured as shown at 40, to pivotally receive trunnlons 41, formed upon the sleeve 21;

The rear end of the shaft 20 is formedsquare in cross-section, as indicated at 42, for detachably receiving thereon a socket 43, of an operating handle'44, of suitable length. This handle is preferably formed in sections 45, hinged together, as shown at 46, so that the handle may be folded. The outermost section 45 is equipped with a transverse hand grip 47, also formed in pivoted sections 48 and 49, as shown.

The operation of the jack is as follows:

The jack is placed beneath the load with the head or element 23 in contact therewith. The operating handle 44 now has its socket 43 placed upon the extension 42 of the operating shaft 20, whereby this operating shaft may be rotated. As the nut 22 engages with the sleeve 21' and is normally held against rotation, the shaft 20 will be moved longitudinally to the left, the shaft 17 also moving in the same direction. The links 31 and 32 are thereby turned upon their pivots 33, and are expanded, as illustrated in Fig. 3, whereby the load will be lifted.

It is obvious that a quick adjustment of the I jack may be effected, before it carries the load, by shifting the operating shaft to the left a suitable distance to properly expand the links 31 and 32, the nut 22 being then freely rdtatable, so that it may beturned, and subsequently to this turning, its teeth will engage the teeth of the sleeve 21. The

- shaft 20 will then be turned in the usual manner to raise the load.

It is to be understood that the form of'our invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit of our invention or the scope'of the subjoined claims,

3 Having thus described our? invention, we

claim:

shaft slidable within the sleeve, an operating shaft arranged above the first named shaft and having .a screw-threaded portion, a second sleeve slidably receiving the screwthreaded portion of the operating shaft and having no screw-threaded engagement therewith, a third sleeve rotatable upon the operating shaft, a nut having screw-threaded engagement with the screw-threaded portion ,of the shaft and having means whereby it may be held by the second named sleeve against turning movement with relation thereto, a lift member carried by the second named sleeve, ineans to rotate the operating shaft, a air of links pivotally connected with the rst and third sleeves, and a second 'pair of links pivotally connected with the 'first pair of links and having pivotal conmotion with the first named shaft and the second sleeve.

- 2. In a jack of the character described, a standard, a substantially horizontal sleeve connected therewith, a substantially horizontal shaft slidable within the sleeve, a substantially horizontal operating shaft arranged above the first named shaft and having a screw-threaded portion, a second sleeve slidably receiving the screw-threaded portion and having no screw-threadedengagement' therewith, a third sleeve rotatably receiving the smooth'portion of the operating shaft, a nut having screw-threaded engagement with the screw-threaded portion of the operating shaft, means whereby the nut may be locked to the second sleeve against rotation with relation thereto, a lift element carried the second sleeve, means to rotate the operating shaft, a pair of links 'pivotally connected with the first and third sleeve, and a second pairof links pivotally connected with the firstpair of links and having pivotal connection with the first named shaft and the second sleeve.

3. In a jack of the character described, an operating shaft having a screw-threaded portion, a sleeve slidably receivingthe screwthreaded portion and ihavin no screw-- threaded engagement therewit a nut engaging the screw-threaded portion of the operating shaft and having means whereby it may belocked to the sleeve against rotation with relation thereto, pivoted links connected with the sleeve and one end portion of the operating shaft, means for supporting the pivoted links, means to rotate the shaft, and

a lift element carried by said sleeve.

4. In a jack of the character described a standard, a substantially horizontal sleeve stantially horizontal operating shaft arwearer ranged above the first named shaft and having a screw threaded portion, a second sleeve slidable receiving the screw threaded portion and having no screw threaded engagement therewith, a third sleeve rotatably receiving the smooth portion of the operating shaft, a

fl fange formed upon said third sleeve, a

flange formed upon said operating shaft, complementary grooves formed in said flanges and coacting to form a ball race, balls arranged Within said grooves, a nut having screw threaded engagement with the screw threaded portions of the operating shaft, means whereby the nut may be locked to the second sleeve against rotation With I v relation thereto, a lift element carried by the second sleeve, means to rotate the operating shaft, a pair of links pivotally connected with the first and third sleeve, and a second pair of links pivotally connected with the first pair of links and having pivotal connection with the first named shaft and second sleeve.

In testimony whereof we afix our signatures in presence of two witnesses.

HARIJAN S. JILLSON. WILLIAM H. SWEENEY. Witnesses:

TIMOTHY M. HAYES, CATHERINE @I. HAYES. 

